The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1988
Filed:
Oct. 28, 1986
Patrice Playe, Houilles, FR;
Abstract
An electrostatic print head for creating a latent image on a dielectric recording medium (1) in order to enable said image to be subsequently transferred to a final medium (generally ordinary paper) after development by inking. The print head comprises a conventional multitude of electrodes (E) and associated conterelectrodes (CE) disposed in parallel rows for progressively building up an electrostatic latent image on the moving dielectric medium (1), and includes an additional rotary coupling electrode (EC) which is raised to a direct potential whose average voltage is of the same polarity as the high voltage control pulses applied to the counterelectrodes, which pulses are themselves of opposite polarity to the pulses applied to said electrodes. The coupling electrodes (EC) is pressed against the recording dielectric medium level with the electrodes and the counterelectrodes, and against the opposite side of the medium relative to said electrodes and counterelectrodes.